:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, sans-serif; line-height: 1.6; color: var(--text); background: var(--bg); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 800px; }

/* Navigation */
.navbar { background: var(--bg); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--secondary); font-weight: 700; font-size: 1.25rem; }
.logo-icon { font-size: 1.5rem; }
.nav-links { display: flex; list-style: none; gap: 32px; }
.nav-links a { text-decoration: none; color: var(--text-light); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* Hero */
.hero { padding: 100px 0 80px; text-align: center; background: linear-gradient(180deg, #eef2ff 0%, var(--bg) 100%); }
.hero h1 { font-size: 3rem; font-weight: 700; color: var(--secondary); margin-bottom: 20px; line-height: 1.2; }
.lead { font-size: 1.25rem; color: var(--text-light); max-width: 600px; margin: 0 auto 32px; }
.cta-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn { display: inline-flex; align-items: center; padding: 14px 28px; border-radius: var(--radius); text-decoration: none; font-weight: 600; transition: all 0.2s; border: none; cursor: pointer; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-secondary { background: white; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }

/* Features */
.features { padding: 80px 0; background: var(--bg-alt); }
.features h2 { text-align: center; font-size: 2rem; margin-bottom: 48px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.card { background: white; padding: 32px; border-radius: var(--radius); border: 1px solid var(--border); transition: transform 0.2s, box-shadow 0.2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.25rem; margin-bottom: 8px; }
.card p { color: var(--text-light); }

/* Page Header */
.page-header { padding: 80px 0 40px; background: var(--secondary); color: white; text-align: center; }
.page-header h1 { font-size: 2.5rem; margin-bottom: 8px; }
.page-header p { color: #94a3b8; }

/* Content */
.content { padding: 60px 0; }
.content h2 { font-size: 1.5rem; margin: 32px 0 16px; color: var(--secondary); }
.content h3 { font-size: 1.25rem; margin: 24px 0 12px; }
.content p { margin-bottom: 16px; color: var(--text-light); }
.content ul { margin-left: 20px; margin-bottom: 16px; color: var(--text-light); }
.content li { margin-bottom: 8px; }
.content code { background: var(--bg-alt); padding: 2px 8px; border-radius: 4px; font-family: monospace; font-size: 0.9em; border: 1px solid var(--border); }

/* Steps */
.steps { display: flex; flex-direction: column; gap: 32px; margin: 32px 0; }
.step { display: flex; gap: 24px; align-items: flex-start; }
.step-number { flex-shrink: 0; width: 48px; height: 48px; background: var(--primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.25rem; }
.step h3 { margin-top: 0; margin-bottom: 8px; }

/* Info Box */
.info-box { background: var(--bg-alt); border-left: 4px solid var(--primary); padding: 24px; border-radius: 0 var(--radius) var(--radius) 0; margin-top: 40px; }
.info-box h3 { margin-top: 0; }

/* Donate Box */
.donate-box { background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 100%); padding: 32px; border-radius: var(--radius); text-align: center; margin-top: 40px; }
.donate-box h3 { margin-bottom: 8px; }
.donate-box p { margin-bottom: 20px; }

/* Footer */
.footer { background: var(--secondary); color: #94a3b8; padding: 60px 0 24px; margin-top: 80px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { color: white; font-size: 1.25rem; margin-bottom: 12px; }
.footer-links h4 { color: white; font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; }
.footer-links ul { list-style: none; }
.footer-links a { color: #94a3b8; text-decoration: none; line-height: 2.2; transition: color 0.2s; }
.footer-links a:hover { color: white; }
.footer-bottom { border-top: 1px solid #334155; padding-top: 24px; text-align: center; font-size: 0.875rem; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: white; flex-direction: column; padding: 24px; border-bottom: 1px solid var(--border); gap: 16px; }
    .nav-links.active { display: flex; }
    .mobile-toggle { display: block; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .step { flex-direction: column; gap: 12px; }
}